TW201217482A - Adhesive film, and connection structure and connecting method for circuit member - Google Patents

Adhesive film, and connection structure and connecting method for circuit member Download PDF

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Publication number
TW201217482A
TW201217482A TW101101598A TW101101598A TW201217482A TW 201217482 A TW201217482 A TW 201217482A TW 101101598 A TW101101598 A TW 101101598A TW 101101598 A TW101101598 A TW 101101598A TW 201217482 A TW201217482 A TW 201217482A
Authority
TW
Taiwan
Prior art keywords
adhesive layer
connection terminal
adhesive film
film
bisphenol
Prior art date
Application number
TW101101598A
Other languages
English (en)
Inventor
Katsuhiko Tomisaka
Jun Taketatsu
Original Assignee
Hitachi Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Chemical Co Ltd filed Critical Hitachi Chemical Co Ltd
Publication of TW201217482A publication Critical patent/TW201217482A/zh

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/321—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by conductive adhesives
    • H05K3/323—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by conductive adhesives by applying an anisotropic conductive adhesive layer over an array of pads
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J171/00—Adhesives based on polyethers obtained by reactions forming an ether link in the main chain; Adhesives based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
    • C09J9/02—Electrically-conducting adhesives
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
    • H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L24/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
    • H01L24/28—Structure, shape, material or disposition of the layer connectors prior to the connecting process
    • H01L24/29—Structure, shape, material or disposition of the layer connectors prior to the connecting process of an individual layer connector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/04—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation using electrically conductive adhesives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
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Description

201217482 六、發明說明： 【發明所屬之技術領域】 本發明係關於黏著薄膜、以及電路構件之連接構造及 連接方法》 【先前技術】 藉由玻璃覆晶封裝（Chip-On-GlaSS,C〇G)或軟板承 載晶片封裝（Chip-〇n-Flex，COF)等而封裝液晶驅動用ic 於液晶顯示用玻璃控制板。COG封裝係使用含導電粒子 之黏著薄膜，直接黏合液晶驅動用1C於玻璃控制板上。 COF封裝係黏合液晶驅動用1C於具有金屬配線之撓性帶， 使用含導電粒子之黏著薄膜，黏合此等於玻璃控制板。 相對於此，隨著近年來液晶顯示的高精細化，液晶驅 動用1C之電極之金凸塊係腳距狹小化，面積狹小化。因此 ，傳統之黏著薄膜有電路連接構件中之導電粒子流出於鄰 接電極（連接端子）間，使發生短路等之問題。另外，爲 避免短路，減少黏著薄膜中之導電粒子數時，凸塊/控制 板間所捕捉之黏著薄膜中之導電粒子數減少，該結果係電 路間之連接電阻上升，發生連接不良之問題。 因此，作爲解決此等問題之方法，開發黏接薄膜之至 少單面上形成絕緣性黏著層，防止COG封裝或COF封裝之 接合品質降低之方法（例如參考專利文獻1 )、或控制黏 著薄膜於加熱加壓時之流動性，確保凸塊/控制板間所捕 捉之導電粒子數之方法（例如參考專利文獻2 ) » -5- 201217482 專利文獻1:特開平8-279371號公報 專利文獻2:特開2002 — 20 1450號公報 【發明內容】 發明之揭示 發明所欲解決之課題 然而，於黏著薄膜之片面上形成絕緣性黏著層之方法 中，凸塊面積小，例如未滿3 000 // m2時，爲得到安定的連 接電阻而增加導電粒子數時，對相鄰電路電極間之絕緣性 仍有改良的空間。另外，控制黏著薄膜之加熱加壓時之流 動性之方法中，封裝液晶驅動用1C於液晶顯示用玻璃控制 板時，就防止因加熱加壓後之黏著薄膜硬化物之儲存彈性 率變高所發生之控制板反翹上，仍留有改良的空間。 因此，本發明係有鑑於上述情況而實施者，以提供可 得到對COG封裝或COF封裝之低電阻電性連接，而且，充 分防止封裝液晶驅動用1C於液晶顯示用玻璃控制板後之控 制板反翹之黏著薄膜，以及使用其之電路構件之連接方法 及連接構造爲目的。 課題之解決手段 本發明係提供層合含有導電粒子之導電性黏著層與絕 緣性黏著層’於層合方向以規定條件加熱加壓後之硬化之 絕緣性黏著層之主面面積C除以硬化之導電性黏著層之主 面面積D之値C/D爲1.2〜3.0之黏著薄膜。 201217482 依據本發明之黏著薄膜，可得到對COG封裝或COF封 裝之低電阻電性連接’而且，充分防止封裝液晶驅動用1C 於液晶顯示用玻璃控制板後之控制板反翹，及鄰接電極間 發生短路。 藉由本發明之黏著薄膜可達成上述目的之理由雖未明 朗，但認爲至少起因於上述C/D値係於上述範圍者。另外 ，C/D値係顯示絕緣性黏著層之流動性及導電性黏著層之 流動性差異之指標。 C/D値於上述數値範圍內，與此値未滿1.2時比較，絕 緣性黏著層之流動性對導電性黏著層之流動性變高。 於如此之本發明之黏著薄膜中，加熱加壓時絕緣性黏 著層比導電性黏著層優先流動。因此，於電路連接時，電 路基板上之電路電極彼此間之空隙容易充塡絕緣性黏著層 ，可容易防止導電性黏著劑層中之導電粒子流入於此空隙 中，認爲可充分防止鄰接電極間發生短路。 另外，若防止導電性黏著劑層中之導電粒子流入於上 述空隙中，認爲爲使連接之電路電極間所捕捉之導電粒子 數變多，可容易得到低電阻之電性連接。 另外，C/D値於上述數値範圍內，與此値超過3.0時比 較，絕緣性黏著層之流動性對導電性黏著層之流動性不會 變得過高。認爲藉此可同時達成電路電極彼此間之良好導 通特性及黏著性，可維持黏著薄膜之高信賴性。 另外，所謂上述規定條件係指以2片玻璃板包夾本發 明之黏著薄膜之狀態，以160°C，2MPa加熱加壓1〇秒鐘之 201217482 條件。 絕緣性黏著層係以含有雙酚F型苯氧樹脂爲宜，導電 性黏著層係以含有至少一種選自雙酚A型苯氧樹脂及雙酚 A· F共聚合型苯氧樹脂所成群之樹脂爲宜。藉此可高度控 制絕緣性黏著層之流動性及導電性黏著層之流動性。 本發明之黏著薄膜係使用於用以電性連接相對向之連 接端子間之上述黏著薄膜，於40 °C，頻率10Hz時之上述黏 著薄膜硬化物之儲存彈性率E’係以0.5〜2.5GPa爲宜。 藉此連接連接端子後之黏著薄膜硬化物中之成份之凝 聚力提升，而且內部應力減低。因此，可得到封裝品之顯 示品質、黏著力及導通特性提升之有效效果。儲存彈性率 未滿0.5 GPa時，與於上述範圍時比較，有黏著薄膜硬化物 中之成份之凝聚力降低，連接電路構件時之連接部份之電 阻上升之趨勢。另外，儲存彈性率若超過2.5 GPa時，與於 上述範圍時比較，有黏著薄膜硬化物之硬度上升，防止封 裝品之控制板反翹之效果降低之趨勢。 絕緣性黏著層及或/導電性黏著層係以含有薄膜形成 材料、環氧樹脂及潛在性硬化劑爲宜。藉此，由本發明可 更確實達成上述效果。 本發明又提供層合含有導電粒子之導電性黏著層與絕 緣性黏著層，絕緣性黏著層含有雙酚F型苯氧樹脂之黏著 薄膜。藉由如此之黏著薄膜，可得到對COG封裝或COF封 裝之低電阻電性連接，而且充分防止封裝液晶驅動用1C於 液晶顯示用玻璃控制板後之控制板反，翅，及鄰接電極間發
S -8- 201217482 生短路。 另外，本發明係提供配置具有第1連接端子之第1電路 構件、與具有第2連接端子之第2電路構件，使第1連接端 子與第2連接端子爲相對向，在相對向配置之第1連接端子 與第2連接端子之間，使黏著薄膜介在其中，進行加熱加 壓，使第1連接端子與第2連接端子進行電性連接所成電路 構件之連接構造，黏著薄膜具有含有導電粒子之導電性黏 著層與絕緣性黏著層，加熱加壓後之硬化之絕緣性黏著層 之主面面積C除以硬化之導電性黏著層之主面面積D之値 C/D爲1.2〜3.0之連接構造。藉由如此之電路構件之連接構 造，因爲使用本發明之黏著薄膜，所以連接信賴性非常高 〇 於上述連接構造中，第1及第2電路構件中至少一者爲 1C晶片即可。 於上述連接構造中，第1及第2連接端子中至少一者之 表面係含有至少1種選自金、銀、錫、鉑族之金屬及銦錫 氧化物（ITO )所成群即可》 於上述連接構造中，第1及第2電路構件中至少一者之 表面係以至少1種選自四氮化三政（silicon nitride，Si3N4 )、聚矽氧烷化合物及聚醯亞胺樹脂所成群所塗佈（ coating)或黏附（adhesion)處理即可。 本發明又提供配置具有第1連接端子之第1電路構件、 與具有第2連接端子之第2電路構件，使該第1連接端子與 該第2連接端子爲相對向，在相對向配置之第1連接端子與 -9- 201217482 第2連接端子之間，使黏著薄膜介在其中，進行加熱加壓 ’使第1連接端子與第2連接端子進行電性連接之電路構件 之連接方法，黏著薄膜具有含導電粒子之導電性黏著層與 絕緣性黏著層，加熱加壓後之硬化之上述絕緣性黏著層之 主面面積C除以硬化之上述導電性黏著層之主面面積D之値 C/D爲1.2〜3.0之連接方法。藉由如此之連接方法，因爲使 用本發明之黏著薄膜，所以可得到信賴性非常高之連接構 造。 發明之功效 藉由本發明提供可得到對COG封裝或COF封裝之低電 阻電性連接，而且充分防止封裝液晶驅動用1C於液晶顯示 用玻璃控制板後之控制板反翹、及鄰接電極間發生短路之 黏著薄膜，以及使用其之電路構件之連接方法及連接構造 用以實施發明之最佳型態 以下係詳細地說明有關本發明之適合型態。但是，本 發明並非侷限於下述之實施型態者。另外，圖式中，賦予 相同符號於相同要素，省略重複的說明。另外，除非特別 例外，上下左右等之位置關係爲基於圖式所示之位置關係 者。另外，圖式尺寸比率並非侷限於圖示比率者。 (黏著薄膜） -10- 201217482 本發明係提供層合含有導電粒子之導電性黏著層與絕 緣性黏著層，於層合方向以規定條件加熱加壓後之硬化之 絕緣性黏著層之主面面積C除以硬化之導電性黏著層之主 面面積D之値C/D爲1.2〜3.0之黏著薄膜。 依據本發明相關之黏著薄膜，可得到對COG封裝或 COF封裝之低電阻電性連接，而且充分防止封裝液晶驅動 用1C於液晶顯示用玻璃控制板後之控制板反翹，及鄰接電 極間發生短路。另外，連接電路時，可防止因導電性黏著 層不流動，不能排除停滞於電極間之樹脂所發生的導通不 良’或絕緣性黏著層過度流動，連接電路間之樹脂充塡不 足而黏著強度降低等之不良狀況。就相同的觀點，C/D値 爲1.5〜2.5尤佳。 絕緣性黏著層與導電性黏著層係以上述規定條件加熱 加壓前之主面面積實質上相同。以此主面面積爲A。另外 ’以上述規定條件加熱加壓後之絕緣性黏著層與導電性黏 著層之主面面積係如上所述，分別爲C、D。作爲絕緣性黏 著層與導電性黏著層之上述加熱加壓所伴隨之流動性指標 ’定義爲C/A、D/A。此等流動性之指標係隨著該數値愈高 ’顯示隨著上述加熱加壓而容易流動。本發明之相關上述 値C/D係與絕緣性黏著層之流動性指標C/a除以絕緣性黏著 層之流動性指標D/A之値相同。 作爲導電粒子，可舉例如金（Au )、銀（Ag )、鎳 (Ni)、銅（Cu)、銲錫等之金屬粒子；碳粒子；被覆Au 、Ag、Cu等之導電性物質於玻璃、陶瓷、塑膠等之非導電 -11 - 201217482 性物質之表面者；及被覆Au等之貴金屬類於Ni等之過 屬之表面者。就得到充分的可使用時間（Pot Life) 點，以導電粒子之表層係Au、Ag、白色金屬之貴金 爲宜’以Au尤佳。另外’作爲導電粒子，使用被覆貴 類於非導電性物質者或熱溶融金屬粒子時，因爲具有 熱加壓之變形性’連接時與電極之接觸面積增加，信 升高，所以適宜。 被覆貴金屬類於非導電性物質之表面者中被覆層 度係爲得到良好電阻，以1 0 0埃以上爲宜。另外，爲 貴金屬類於Ni等之過渡金屬之表面者時，由貴金屬類 成之被覆層之缺損或混合分散導電粒子時所發生之被 之缺損等所造成氧化還原作用而發生游離自由基，有 保存性降低之虞。因此，被覆層厚度係以300埃以上 。另外，因爲被覆層厚度成Ι/zm時，上述效果成飽和 以以被覆層厚度未滿1 # m爲宜，但此並非限制被覆層 。上述導電粒子係可單獨1種或組合2種以上使用》 如此導電粒子係相對於1〇〇體積份之黏著薄膜中 脂成份，使含有〇.1〜30體積份爲宜，以使含有0.1〜 積份尤佳。藉此可更高度防止因過剩的導電粒子而鄰 路短路。另外，上述所謂「樹脂成份」係指黏著薄膜中 粒子以外的成份，具體上可指後述之薄膜形成材料、 樹脂、潛在性硬化劑等。 絕緣性黏著層與導電性黏著層係以含有薄膜形成 、環氧樹脂及潛在性硬化劑爲宜。藉此’由本發明可 渡金 之觀 屬類 金屬 由加 賴性 之厚 被覆 所形 覆層 引起 爲宜 ，所 度者 之樹 10體 接電 導電 環氧 材料 更確 -p -12- 201217482 實地達成上述效果。 所謂薄膜形成材料，爲使液狀物固體化，使構成組成 物爲薄膜形狀時’該薄膜之操作將變得容易，而且賦予不 容易裂開、斷裂、發黏之機械特性等者，可以通常狀態作 爲薄膜操作者。作爲該具體例，可舉例如苯氧樹脂、聚乙 烯醇縮甲醛樹脂、聚苯乙烯樹脂、聚乙烯醇縮丁醛樹脂、 聚酯樹脂、聚醯胺樹脂、二甲苯樹脂及聚胺基甲酸乙酯樹 脂。此等係可單獨1種或組合2種以上使用。其中，因黏著 性、相溶性、耐熱性及機械強度優異，以苯氧樹脂尤佳* 苯氧樹脂係例如藉由使二官能性酹類與表鹵醇反應至 高分子量，或使二官能性環氧樹脂與二官能性酚類聚加成 所得之樹脂。具體上，苯氧樹脂係可藉由使1莫耳之二官 能性酚類與0.985〜1.015之表鹵醇於鹼金屬氫氧化物之存 在下’於非反應性溶劑中，以4 0〜1 2 0 °C之溫度反應而得 〇 作爲如此之苯氧樹脂，就提升機械特性或熱特性之觀 點上’以藉由使二官能性環氧樹脂與二官能性酚類之配合 當量爲環氧基/酚羥基爲I/O .9〜1/1.1，於鹼金屬化合物、 有機磷系化合物、環狀胺系化合物等觸媒之存在下，於沸 點爲120 °C以上之醯胺系、醚系、酮系、內酯系、醇系等 之有機溶劑中，使反應固形物爲5 0質量％以下之狀態，加 熱成50〜200°C，進行聚加成反應所得者爲宜。 作爲二官能性環氧樹脂，可舉例如雙酚A型環氧樹脂 、雙酚F型環氧樹脂、雙酚AD型環氧樹脂、雙酚s型環氧 -13- 201217482 樹脂。二官能性酚類係具有2個酚性羥基者，可舉例如雙 酚A、雙酚F、雙酚AD、雙酚S等之雙酚類。苯氧樹脂亦可 由自由基聚合性之官能基所變性。 上述之苯氧樹脂係可使用單獨1種’或混合2種以上使 用。另外，絕緣性黏著層與導電性黏著層中亦可使含有種 類相異的苯氧樹脂。例如使絕緣性黏著層含有雙酚F型苯 氧樹脂，使導電性黏著層含有至少一種選自雙酚A型苯氧 樹脂及雙酚A· F共聚合型苯氧樹脂所成群之樹脂爲宜。藉 此而絕緣性黏著層之耐熱性及流動性上升，導電性黏著層 之彈性率及流動性降低。因此，導電性黏著層對於絕緣性 黏著層之流動性受到抑制。 作爲環氧樹脂，可使用表鹵醇與雙酚A、雙酚F或雙酚 AD所衍生之雙酚型環氧樹脂；表鹵醇與苯酚酚醛或甲酚 酚醛所衍生之環氧酚醛樹脂；含有萘環骨架之萘系環氧樹 脂；環氧丙基胺、縮水甘油醚、聯苯及脂環式等之i分子 內具有2個以上之環氧丙基之各種環氧化合物。此等環氧 樹脂係可單獨或混合2種以上使用。此等環氧樹脂係以使 用減低不純物離子（Na+、Cl_ )等、或水解性氯等成 300PPm以下之高純度品，因爲防止電子遷移（electron migration )，所以適宜。 作爲本發明使用之潛在性硬化劑，可舉例如咪唑系硬 化劑、醯胼系硬化劑、三氟化硼-胺配位化合物、鎏鹽、 胺亞胺（amineimide )、聚胺之鹽、雙氰胺。此等潛在性 硬化劑係可單獨1種或混合2種以上使用，亦可混合分解促 -14- 201217482 進劑、抑制劑等使用。另外，以聚胺基甲酸乙酯系 系之高分子物質等被覆此等硬化劑而微膠囊化者， 延長使用時間，所以適宜。 本發明之黏著薄膜係可於絕緣性黏著層及/或 黏著層中，含有以丙烯酸、丙烯酸酯、甲基丙烯酸 烯腈中之至少1種作爲單體成份之聚合物或共聚物 含有縮水甘油醚基之縮水甘油丙烯酸酯或含縮水甘 丙烯酸酯之共聚物系丙烯酸橡膠時，因爲應力緩和 所以適宜。如此丙烯酸橡膠之分子量（藉由尺寸大 層析法之聚苯乙烯換算重量平均分子量），就提高 膜之凝聚力之觀點，以20萬以上爲宜。 黏著薄膜係可於絕緣性黏著層及/或導電性黏 ，再含有塡充劑、軟化劑、促進劑、抗老化劑、難 、色素、搖變劑（Thixotropic Agent)、交聯劑、 胺樹脂及異氰酸酯類。 含有塡充劑時，因爲可得到連接信賴性等之提 以適宜。塡充劑係該最大徑若爲未滿導電粒子之粒 使用。塡充劑之含有比率係相對於1 〇〇體積份之黏 中之樹脂成份，以5〜60體積份之範圍爲宜。此含 若超過60體積份時，信賴性提升效果變得容易飽和 未滿5體積份之塡充劑時之效果小。 作爲交聯劑，就提升黏著性之觀點上，以酮亞 烯基、丙烯基、胺基、環氧基及異氰酸基含有物爲 爲該具體例，作爲具有胺基之矽烷交聯劑，可舉例 、聚酯 因爲可 導電性 酯或丙 。倂用 油甲基 優異， 小排除 黏著薄 著層中 燃化劑 三聚氰 升，所 徑即可 著薄膜 有比率 ，添加 胺、乙 宜。作 I如N - -15- 201217482 yS (胺基乙基）7 —胺基丙基三甲氧基矽烷、N — yS (胺 基乙基）T -胺基丙基甲基二甲氧基矽烷、7 —胺基丙基 三乙氧基矽烷、n-苯基_ r -胺基丙基三甲氧基矽烷。 另外，作爲具有酮亞胺之矽烷交聯劑，可舉例如使丙酮、 甲基乙基酮、甲基異丁基酮等之酮化合物反應於上述具有 胺基之交聯劑所得者。 上述黏著薄膜之硬化物於40°c，頻率10Hz時之儲存彈 性率E’係以0.5〜2.5GPa爲宜，以1.0〜2.0GPa尤佳。 依此與儲存彈性率爲上述範圍外時比較，連接連接端 子後之黏著薄膜硬化物中之成份之凝聚力提升，而且內部 應力減低。因此，得到使用此黏著薄膜之封裝品之顯示品 質、黏著力及導通特性提升等之有效效果。儲存彈性率未 滿0.5GPa時，與於上述範圍時比較，黏著薄膜硬化物中之 成份之凝聚力降低，連接電路構件時之連接部份之電阻有 上升之趨勢。另外，儲存彈性率超過2.5GPa時，與於上述 範圍時比較，黏著薄膜硬化物之硬度上升，防止封裝品控 制板反翹之效果有降低之趨勢。 本發明之黏著薄膜係可由絕緣性黏著層及導電性黏著 層所成之2層所構成者，亦可由3層以上的層所構成者。由 3層以上的層所構成時，以絕緣性黏著層及導電性黏著層 交互層合者爲宜。例如作爲由3層所構成之黏著薄膜，以 導電性黏著層、絕.緣性黏著層及導電性黏著層之該順序所 層合者，或絕緣性黏著層、導電性黏著層及絕緣性黏著層 之該順序所層合者。此等情況時，導電性黏著層彼此間或
-16- 201217482 絕緣性黏著層彼此間之材料、組成及/或膜厚係可相異或 相同。 由3層以上的層所構成之黏著薄膜中，於層合方向以 規定條件加熱加壓後，關於互相連接之絕緣性黏著層中至 少1組之C/D値爲1.2〜3.0。另外，由3層以上的層所構成之 黏著薄膜中，於層合方向以規定條件加熱加壓後，關於各 互相連接之絕緣性黏著層之C/D値皆爲1.2〜3.0爲宜。 滿足上述C/D之數値範圍之本發明之黏著薄膜係例如 可藉由下述（1) 、 （2)中任1層之絕緣性黏著層、與下 述（3 )〜（5 )中任1層之導電性黏著層組合而得。 (1) 含有雙酚F型苯氧樹脂之絕緣性黏著層。 (2) 含有重量平均分子量爲1〇〇〇〜loooo之雙酚A型 固體環氧樹脂、重量平均分子量爲1000〜10000之雙酚A· F型固體環氧樹脂、及重量平均分子量爲10〇0〜10000之F 型固體環氧樹脂中任一種之絕緣性黏著層》 (3) 含有雙酚A型苯氧樹脂、或雙酚a· F共聚合型 苯氧樹脂之導電性黏著層。 (4) 含有分子內含芴環之苯氧樹脂之導電性黏著層 〇 (5 )相對於100體積份之樹脂成份，含有5〜30體積 份之粒徑爲0.1〜l.〇#m之非導電性微粒子之導電性黏著 層。 上述之黏著薄膜係可使用於例如COG封裝或COF封裝 中用以電性連接1C晶片及撓性帶或玻璃基板。 -17- 201217482 (電路構件之連接構造） 本發明係提供配置具有第1連接端子之第1電路構件、 與具有第2連接端子之第2電路構件，使第1連接端子與第2 連接端子爲相對向，在相對向配置之第1連接端子與第2連 接端子之間，使上述黏著薄膜介在其中，進行加熱加壓， 使第1連接端子與第2連接端子進行電性連接所成之電路構 件之連接構造。 圖1係表示有關本發明之電路構件之連接構造之一種 適合實施型態之槪略斷面圖。圖1所示之連接構造100係具 備相對向之第1電路構件10及第2電路構件20，第1電路構 件10及第2電路構件20之間，設有連接此等之電路連接構 件30。 作爲第1及第2電路構件10、20之具體例，可舉例如半 導體晶片、電阻晶片或電容器晶片等之晶片零件或印刷基 板等之基板。作爲連接構造100之連接型態，亦有1C晶片 與晶片搭載基板之連接、電性電路互相連接、COG封裝或 COF封裝中之1C晶片與玻璃基板或撓性帶之連接等。 尤其，電路構件10、20中至少一者爲1C晶片。 另外，電路構件10、20中至少一者之表面係以至少1 種選自四氮化三矽、聚矽氧烷化合物及聚醯亞胺樹脂所成 群所塗佈或黏附處理爲宜。依據上述黏著薄膜，對如此電 路構件之黏著強度尤其良好。 第1電路構件10係具有第1電路基板11與於第1電路基
S -18- 201217482 板11之主面Ila上所形成之第1電極（連接端子）12»第2 電路構件20係具有第2電路基板21與於第2電路基板21之主 面21a上所形成之第2電極（連接端子）22。於連接構造 100中，第1電極12與第2電極22成相對向配置，而且電性 連接。另外，第1電路基板11之主面lla上及第2電路基板 21之主面21a上，有時亦可形成絕緣層（無圖示）。 第1及第2電極11、12中至少一者之表面係含有至少1 種選自金、銀、錫、鉑族之金屬及銦錫氧化物（ITO )所 成群爲宜。 電路連接構件3 0係上述黏著薄膜之硬化物。由黏著薄 膜之硬化物中之導電粒子（無圖示），電性連接第1電極 12及第2電極22。 本實施型態之連接構造10 0之製造方法，亦即電路構 件10、2〇之連接方法係如下所述。首先，第1及第2電路構 件10、20之間，使上述黏著薄膜介在其中。此時，配置第 1及第2電路構件10、20，使第1電極12及第2電極22相對向 。另外，黏著薄膜係可介在其中，以絕緣性黏著層側連接 第1電極12，亦可介在其中以連接第2電極22。接著，介在 第1及第2電路構件10、2〇之間，加熱黏著薄膜，往此等之 層合方向加壓，施以黏著薄膜之硬化處理，形成連接構造 100。硬化處理係可由一般方法進行，該方法係可依黏著 薄膜而適當選擇。 a 以上係說明關於本發明適合之實施型態，但本發明並 非侷限於上述實施型態者。本發明係於不超出該要旨之範 -19- 201217482 圍，可進行各種改變。 【實施方式】 實施例 以下係由實施例詳細地說明本發明，但本發明並非侷 限於此者。另外，於下述實施例中，雙酚F型苯氧樹脂係 東都化成股份有限公司製，商品名「FX — 316」、雙酚A型 苯氧樹脂係INCHEM coporation公司製，商品名「PKHC」、 雙酚A· F共聚合型苯氧樹脂係東都化成股份有限公司製， 商品名「ZX - 1356-2」、芳香族鎏鹽係三新化學工業股份 有限公司製，商品名「3 311-八丨(181—60」。另外，作爲液狀 環氧，使用含有微膠囊型潛在性硬化劑之液狀環氧（旭化 成化學公司製，商品名「Novacure HX - 3941)，環氧當量 185)。 (實施例1 ) 使l〇〇g之雙酚F型苯氧樹脂溶解於質量比爲50: 50之 甲苯（沸點爲11〇.6°(：，3?値爲8.90)與醋酸乙酯（沸點爲 7 7.1 °C，S P値爲9 · 1 0 )之混合溶劑，得到固形物爲6 0質量 %之溶液。配合液狀環氧於該溶液，再添加作爲潛在性硬 化劑之2.4g之芳香族鎏鹽，得到混合液。另外，上述液狀 環氧係以雙酚F型苯氧樹脂：液狀環氧之固體質量比成60 :40的量配合。使用塗佈裝置塗佈所得之混合液於厚度爲 50 # m之單面爲聚矽氧烷所表面處理之PET薄膜後，由70 -20- 201217482 °C熱風乾燥5分鐘，形成厚度爲1 〇 v m之絕緣性黏著層。 另外，使50g之雙酚A型苯氧樹脂溶解於質量比爲50: 5〇之甲苯與醋酸乙酯之混合溶劑，得到固形物爲4 0質量％ 之第1溶液。另一方面，使50g之雙酚A· F共聚合型苯氧樹 脂溶解於質量比爲50: 50之甲苯與醋酸乙酯之混合溶劑， 得到固形物爲45質量％之第2溶液。 混合上述之第1及第2溶液，再配合液狀環氧於該混合 液。此等係以雙酚A型苯氧樹脂：A· F共聚合型苯氧樹脂 :液狀環氧之固體質量比成30: 30: 40的量配合。於所得 之配合液，再配合、分散相對於樹脂成份爲1〇體積％之導 電粒子，再添加作爲潛在性硬化劑之2.4g之芳香族鎏鹽， 得到分散液。使用塗佈裝置塗佈所得之分散液於厚度爲50 之單面爲聚矽氧烷所表面處理之PET薄膜後，由70°C 熱風乾燥5分鐘，形成厚度爲10/zm之導電性黏著層。使用 層合機互貼形成之絕緣性黏著層及導電性黏著層，得到以 PET薄膜所包夾之黏著薄膜。 (實施例2 ) 除了絕緣性黏著層形成係如下述取代以外，與實施例 1同樣地操作，得到附有PET薄膜之黏著薄膜。使100g之雙 酚F型苯氧樹脂溶解於質量比爲50 : 5 0之甲苯與醋酸乙酯 之混合溶劑，得到固形物爲6 0質量％之第1溶液。另一方面 ，使50g之雙酚A · F共聚合型苯氧樹脂溶解於質量比爲50 :5 0之甲苯與醋酸乙酯之混合溶劑，得到固形物爲45質量 201217482 %之第2溶液。混合上述之第1及第2溶液，再配合液狀環氧 於該混合液。此等係以雙酚F型苯氧樹脂：A· F共聚合型 苯氧樹脂：液狀環氧之固體質量比成30: 30: 40的量配合 。於所得之配合液，再添加作爲潛在性硬化劑之2.4g之芳 香族鎏鹽，得到混合液。使用塗佈裝置塗佈所得之混合液 於厚度爲50// m之單面爲聚矽氧烷所表面處理之PET薄膜 後，由70°C熱風乾燥5分鐘，形成厚度爲10 μ m之絕緣性黏 著層。 (比較例1 ) 使50g之雙酚A型苯氧樹脂溶解於質量比爲50: 50之甲 苯與醋酸乙酯之混合溶劑，得到固形物爲40質量％之第1溶 液。另一方面，使50g之雙酚A. F共聚合型苯氧樹脂溶解 於質量比爲50: 50之甲苯與醋酸乙酯之混合溶劑，得到固 形物爲45質量％之第2溶液。混合上述之第1及第2溶液’再 配合液狀環氧於該混合液。此等係以雙酚A型苯氧樹脂： A. F共聚合型苯氧樹脂：液狀環氧之固體質量比成30: 30 :40的量配合。於所得之配合液，再添加作爲潛在性硬化 劑之2.4g之芳香族鎏鹽，得到混合液。使用塗佈裝置塗佈 所得之混合液於厚度爲50/zm之單面爲聚矽氧烷所表面處 理之PET薄膜後，由70T：熱風乾燥5分鐘，形成厚度爲1〇 A m之絕緣性黏著層。 使100g之雙酚F型苯氧樹脂溶解於質量比爲50: 50之 甲苯與醋酸乙酯之混合溶劑，得到固形物爲60質量％之第1
-22- S 201217482 溶液。另二方面，使50g之雙酚A· F共聚合型苯氧樹脂溶 解於質量比爲50: 50之甲苯與醋酸乙酯之混合溶劑，得到 固形物爲45質量％之第2溶液。混合上述之第1及第2溶液， 再配合液狀環氧於該混合液。此等係以雙酚F型苯氧樹脂 :A· F共聚合型苯氧樹脂：液狀環氧之固體質量比成30: 30: 40的量配合。於所得之配合液，再配合、分散相對於 樹脂成份爲1 〇體積％之導電粒子，再添加作爲潛在性硬化 劑之2.4g之芳香族鎏鹽，得到分散液。使用塗佈裝置塗佈 所得之分散液於厚度爲50/zm之單面爲聚矽氧烷所表面處 理之PET薄膜後，由70°C熱風乾燥5分鐘，形成厚度爲1〇" m之導電性黏著層。使用層合機互黏形成之絕緣性黏著層 及導電性黏著層，得到以PET薄膜所包夾之黏著薄膜。 (比較例2 ) 除了如下述形成絕緣性黏著層以外，與實施例1同樣 地操作，得到附有PET薄膜之黏著薄膜。使l〇〇g之雙酚F型 苯氧樹脂溶解於質量比爲50: 50之甲苯與醋酸乙酯之混合 溶劑’得到固形物爲60質量％之溶液。配合液狀環氧於該 溶液中，得到混合液。另外，上述液狀環氧係以雙酚F型 苯氧樹脂：液狀環氧之固體質量比成60: 40的量配合。未 添加作爲潛在性硬化劑之芳香族鎏鹽，使用塗佈裝置塗佈 所得之混合液於厚度爲50# m之單面爲聚砂氧院所表面處 理之PET薄膜後，由70°C熱風乾燥5分鐘，形成厚度爲1〇以 m之絕緣性黏著層。 -23- 201217482 (形成電路構件之連接構造） 分別使用實施例1、2及比較例1、2之黏著薄膜，製作 電路構件之連接構造。詳細而言，首先，剝離除去黏著薄 膜之導電性黏著層側之PET薄膜，露出導電性黏著層之表 面。接著，於厚度爲0.5 mm之玻璃上，藉由蒸著而形成 ITO膜，得到ITO基板（表面電阻< 20/口）。接著，使上 述黏著薄膜之導電性黏著層表面相對向於I TO膜表面，使 接觸下，以70°C，0.5MPa，3秒鐘之條件，於此等之層合 方向加熱加壓，假固定黏著薄膜於ITO基板。之後，自黏 著薄膜剝離除去另一方之PET薄膜。接著，載置設有2列（ 成千鳥格排列）之凸塊面積爲30 μ mx50从m，腳距爲40 μ m，高度爲15#m之金凸塊之1C晶片於上述黏著薄膜上。 以石英玻璃及加壓頭夾住載置1C晶片之黏著薄膜，藉由 160°C，lOOMPa，10秒鐘之條件加熱加壓，連接ITO基板 及1C晶片，製造電路構件之連接構造。 (凸塊-玻璃基板配線間捕捉粒子數之測定） 關於上述之連接構造，由ITO基板之玻璃側，以金屬 顯微鏡（倍率爲500倍）觀察200處之30/ζπιχ50μηι之範圍 ，計數ΙΤΟ基板與金凸塊所包夾之導電粒子數。接著’藉 由相加平均而求出每一個範圍之導電粒子。該結果如表1 所示。 -24- 201217482 (測定連接電阻） 關於使用實施例1、2及比較例1、2之黏著薄膜所得之 電路構件之連接構造，使用4端子測定法’以萬用表測定 初期、及於高溫高濕槽（85°C ’ 85%RH環境下）中保持 5 00小時後之該連接部份之電阻値。該結果如表1所示。 (測定C/D値） 將實施例1、2及比較例1、2之黏著薄膜，切成φ 5.5 mm之圓板狀。接著，將切出的黏著薄膜，夾於厚度爲 0.7mm，15mmxl5mm之 2片玻璃板之間，以 160°C ’ 2MPa， 1 〇秒鐘之條件進行加熱加壓。由加熱加壓前之黏著薄膜之 主面面積A，與加熱加壓後之硬化絕緣性黏著層之主面面 積C，求出C/A値。進而，由加熱加壓前之黏著薄膜之主面 面積A，與加熱加壓後之硬化導電性黏著層之主面面積D ，求出D/A値，藉由C/A値除以D/A値，算出C/D値。該結 果如表1所示。 另外，上述主面面積C及D係使用掃描器等拍攝，使用 影像處理裝置，求出玻璃板加熱加壓後之硬化黏著薄膜之 擴展。面積C係由黏著薄膜之最外圍所包圍之部份面積， 面積D係由最外圍之內側圍所包圍之部份面積。此等係最 外圍與最外圔內側圍之間的部份係肉眼看到爲白色透明， 以掃描器拍攝時看到爲淡青色，另外，最外圍內側圍之內 側部份係肉眼看到爲泛黑色，以掃描器拍攝時看到爲白色 ，所以可以區別。以掃描器拍攝加熱加壓後之硬化黏著薄 -25- 201217482 膜的影像係如圖2所示。另外，圖2所示之硬化黏著薄膜之 最外圍之直徑約爲9mm。 〔表1〕 項目 實施例1 實施例2 比較例1 比較例2 絕緣性黏著層之主面面積C 72.4 59.3 47.1 102.0 導電性黏著層之主面面積D 32.9 32.9 42.8 32.9 流動性比(C/D) 2.2 1.8 1.1 3.1 凸塊-玻璃基板配線間粒子數 18 17 9 20 連接電阻 初期値 <1 <1 <1 >3 高溫高濕處理後 <5 <5 >20 >20 【圖式簡單說明】 [圖1]表示有關本發明之電路構件之連接構造之一種實 施型態之槪略斷面圖。 [圖2]表示以掃描器拍攝加熱加壓後之硬化黏著薄膜之 影像圖。 【主要元件符號說明】 1 0 :第1電路構件 1 1 :第1電路基板 1 2 :第1電極 20 :第2電路構件 21 :第2電路基板 22 :第2電極 3 0 :電路連接構件 100 :連接構造 -26-

Claims (1)

  1. 201217482 七、申請專利範圍： 1· 一種黏著薄膜，其特徵爲，層合有含導電粒子之 導電性黏著層與絕緣性黏著層， 該絕緣性黏著層含有雙酚F型苯氧樹脂。 2. 如申請專利範圍第1項之黏著薄膜，其中該導電性 黏著層係含有選自雙酚A型苯氧樹脂及雙酚A· F共聚型苯 氧樹脂所成群中至少一種樹脂者。 . 3. 如申請專利範圍第1項或第2項之黏著薄膜，其係 使用於用以電性連接相對向之連接端子間者》 4. 如申請專利範圍第1項或第2項之黏著薄膜，其中 在4〇°C、頻率10Hz下該黏著薄膜之硬化物之儲存彈性率Ει 爲 0· 5 〜2.5 GPa。 5 _如申請專利範.圍第1項或第2項之黏著薄膜，其中 該絕緣性黏著層及/或該導電性黏著層含有薄膜形成材料 、環氧樹脂及潛在性（latent )硬化劑。 6. —種電路構件之連接構造，其特徵爲，將具有第i 連接端子之第1電路構件（circuit component)，與 具有第2連接端子之第2電路構件，配置（arranged) 爲使該第1連接端子與該第2連接端子爲相對向（opposed )， 在相對向配置之該第1連接端子與該第2連接端子間有 如申請專利範圍第1項至第5項中任一項之黏著薄膜介在其 中（interposed between)，予以加熱加壓，使該第1連接 端子與該第2連接端子進行電性連接所成者。 -27- 201217482 7. —種電路構件之連接方法，其特徵爲將具有第1連 接端子之第1電路構件，與 具有第2連接端子之第2電路構件，配置爲使該第1連 接端子與該第2連接端子爲相對向， 在相對向配置之該第1連接端子與該第2連接端子之間 使如申請專利範圍第1項至第5項中任一項之黏著薄膜介在 其中，進行加熱加壓，使相對向配置之該第1連接端子與 該第2連接端子電性連接者。 -28-
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